Lumping device for back-digging shovels



F 4. 93-1. M. L. FYKSE ET AL I 1,794,154

DUMPING DEVICE FOR BACK DIGGING SHOVELS Filed Dec. 4, 1929 Wager flew/W071 J INVENTORS.

BYWm/b @444 A TTORNEYS.

Patented Feb. 24, 1931 UNITED STATES. PATENT OFFICE -MITCHELL L. FYKSE AND ROGER SHERMAN HOAB, OF SOUTH MILWAUKEE,

ASSIGNORS TO BUOYBUS-EBIE COMPANY, OF SOUTH MILWAUKEE, WISCONSIN, A.

CORPORATION OF DELAWARE LUIIPING DEVICE FOR BACK -DIGGING SHOVELS Application filed December 4, 1929. Serial No. 411,473.

the excavating art. They are characterized by a dipper mounted on the lower end of a handle, which is pivoted intermediate its ends on the outer end of the boom, the inner end of the boom being pivoted to the frame of the machine. The shovel faces toward the machine. On the main frame of the machine is a two-drum winch, from which one rope, associated with the dipper, tends to swing the dipper toward the machine. The other rope of the winch is associated with the upper end of the dipper handle and tends both to hoist the boom and to swing the dipper away from the machine.

The principal object of our invention 1s to provide a swiveled dipper for such shovel, to-

gether with means for holding this dipper rigid with respect to the handle during digging, and for tilting the dipper at Wlll. to dump. Further objects and advantages of our invention will be readily evident, as the description progresses.

The invention consists in the novel parts, and in the combinations and arrangements thereof, which are defined in the appended claims, and of which one embodiment is exemplified in the accompanying drawing, which are hereinafter particularly described and explained.

erence number is applied to the same member or to similar members.

The single figure is a side elevation of a power shovel embodying our invention.

Referring to the drawing, it will be seen that 11 is the main base of a power shovel, supporting a boom 12, an A-frame 13, and a main winch 14. The winch includes two drums 15 and 16. The boom 12 is pivoted to the base 11 at 17. i

A handle 18 is pivoted to the boom 12'at a sheave 21 and a stop 22, and at the outer side of its lower end a sheave 23.

Throughout the description, the same ref- 'rope 40 and lever 41.

A dipper 24 is pivoted on the lower end of the handle 18 at 25. This dipper is open toward the main base 11, and carries at its open end a rope anchora e 26, and at its closed end gsrope anchorage 2 and a cam-shaped guide There is a sheave 29 on the A-frame 13.

A rope 30 passes from the anchorage 27 over the guide'28, under the sheave 23, over the sheave 20, over the sheave 29, to the winch co drum 15. This rope tends to hoist the boom 12, and to swing the handle 18 in a counterclockwise direction about the pivot 19, and to tilt the dipper 24 in a counterclockwise direction about the pivot 25.

A rope 31 passes from the anchorage 26, over the sheave 21, to the winch drum 16. This rope tends to hold the dipper 24 in rigid digging position against the stop 22, and to aging the handle 18 clockwise about the pivot These ropes should be so disposed, that the rope 31, during digging, will always have a greater tendency to tilt the dipper about the pivot 25, than does the rope 30. a Accordingly, when tension is in both ropes, during any operation of the shovel, the dipper will remain against the stop 22, and the tendency of the rope 30 to tilt the dipper, and thus dump it, will be ineffective. so From an anchorage 32 on the handle 18, a rope 33 runs to an anchorage on a drum 34 mounted on the boom 12. From an anchorage on this same drum, a rope 35 runs over a sheave 36 on the A-frame 13, to a light counterwei'ght 37.

Integral with the rope drum 34 is a brake drum 38, around which is disposed a brake band 39, which may be set by means of the 25, thus dumping its contents. The brake can then be released, and the pull on rope 31 will restore the dipper to its normal digging position.

It is to be noted that although the setting of the brake 39 inhibits positively merely the tendency of rope 30 to swing the dipper handle 18, and not its tendency to hoist the boom 12; nevertheless a proper relative tension on ropes'30 and 31by the operator, during dumping, will inhibit this last-named tendency as well.

Throughout the description and the claims we have, for clarity, employed the word hoist to describe rotating the boom 12 in a vertical plane about its pivot 17 the word swing to describe rotating the handle 18 in a vertical plane about its pivot 19; and the word tilt to describe rotating the dipper 24 in a vertical plane about its pivot 25. Ac-.

cordingly when, in the claims, we refer to means for rendering ineffective these two tendencies, we have in mind the operation described in this paragraph.

We wish it to be understood that our invention is not to be limited to the specific form or arrangement of parts hereinbefore described, except with respect to any claim which imposes such limitations.

We claim:

1. In a back-digging shovel, the combination of: a main frame; a boom, pivoted at its lower end to the frame, for hoisting in a vertical plane about its pivot; a dipper handle, pivoted intermediate its ends at the outer end of the boom, for swinging in a vertical plane about its pivot; a digging dipper pivoted on the lower end of the handle,

and facing toward the frame; single means tending to hoist the boom, swing the dipper away from the frame, and tilt the dipper about its pivot for dumping; means for rendering ineffective, at will, the hoisting and swinging tendencies of the last-named n'1eans; and single means for tilting the dipper about its pivot to digging position and for swinging the dipper toward the frame.

2. In av back-digging shove], the combination of: a main frame; a boom, pivoted at its lower end to the frame, for hoisting in a vertical plane about its pivot; a dipper handle, pivoted intermediate its ends at the outer end of the boom, for swinging in a vertical plane about its pivot; a digging dipper pivoted on the lower end of the handle, and facing toward the frame; two winch drums; a sheave on the upper end of the dipper handle; a rope, running from the bottom of the dipper, over this sheave, to one drum; a sheave on that side of the lower end of the handle nearer toward the base; a rope running from the front of the dipper, over this sheave, to the other drum; and means for rendering ineffective, at will, the hoisting and swinging tendencies of the first-named rope.

3. In a back-digging shovel, the combination of: a main frame; a boom, pivoted at its lower end to the frame, for hoisting in a vertical plane about its pivot; a dipper handle, pivoted intermediate its ends at the outer end of the boom, for swinging in a vertical plane about its pivot; a digging dipper, pivoted on the lower end of the handle, and facing toward the frame; two winch drums; a sheave on the upper end ofthe dipper handle; a rope, running from the bottom of the dipper, over this sheave, to one drum; a sheave on that side of the lower end of the handle nearer toward the base; a rope, running from the front of the dipper, over this sheave, to the other drum; means for limiting the tilting of the dipper under the influence of the last-named rope; and means for rendering ineffective, at will, the hoisting and swinging tendencies of the first-named rope.

4. In a back-digging shovel, the combination of: a main frame; a boom, pivoted at its lower end to the frame, for hoisting in a vertical plane about its pivot; a dipper handle, pivoted intermediate its ends at the outer end of the boom, for swinging in a vertical plane about its pivot; a digging dipper pivoted on the lower end of the handle, and facing toward the frame; two winch drums; a sheave on the upper end of the dipper handle; a rope, running from the bottom of the dipper, over this sheave, to one drum; a guide on the bottom of the dipper, over which guide this rope is adapted to pass; a sheave on that side of the lower end of the handle nearer toward the base; a rope, running from the front of the dipper, over this sheave, to the other drum; and means for rendering ineffective, at will, the hoisting and swinging tendencies of the first-namedrope.

5. In a back-digging shovel, the combination of: a main frame; a boom, pivoted at its lower end to the frame, for hoisting in a vertical plane about its pivot; a dipper handle, pivoted intermediate its ends at the outer end of the boom, for swinging in a vertical plane about its pivot; a digging dipper pivoted on the lower end of the handle, and facing toward the frame; two winch drums; a

sheave on the upper end of the dipper handle; a rope, running from the bottom of the dipper, over this sheave, to one drum; a guide on the bottom of the dipper, over which guide this rope is adapted to pass; a sheave on that side of the lower end of the handle nearer toward the base; a rope, runmng from the front of the dipper, over this sheave, to the other drum; means for limiting the tilting of the dipper under the infiuence of the last-named rope; and means for rendering ineffective, at will, the hoisting and swinging tendencies of the firstnamed rope.

6. In a backdigging shovel, the combine tion of: a main frame; a boom, pivoted at its lower end the frame, for hoisting in a versheave on the upper end of the dipper handle; a rope, running from the bottom of the dipper, over this sheave, to one drum; a sheave on that side of the lower end of the handle nearer toward the base; a rope, running from the front of the dipper, over this sheave, to the other drum; and means for rendering ineffective, at will, the hoistin and swinging tendencies of the first-name ro this means consisting in a rope-drum, a rake to prevent the rotation of this drum, a rope passing from the lower portion of the handle toan-anchorage on this drum, and means for takin up the slack in this ro e.

7 In a backigging shovel, the com ination of: a main frame; a boom, pivoted at its lower end to the frame, for hoisting in a vertical plane about its pivot; a dipper handle, pivoted intermediate its ends at the outer end of the boom, for swinging in a vertical plane about its pivot; a digging dipper, pivoted on-the lower end of the handle, and facing toward the frame; two winch drums; a sheave on the upper end of the dipper handle; a rope, running from the bottom of the dipper, over this sheave, to one drum; a sheave on that side of the lower end of the handle nearer toward the frame; a rope, running from the front of the dipper, over this sheave, to the other drum; means for limiting the tilting of the dipper under the influence of the last-named rope; and means for rendering ineffective, at will, the hoisting and swinging tendencies of the first-named rope, this means consisting in a rope drum, a

brake to prevent the rotation of this drum, a rope passing from the lower portion of the handle to an anchorage on this drum, and means for takin up the slack in this ro e.

8. In a backigging shovel, the com ination of: a main frame; a boom, pivoted at its lower end to the frame, for hoisting in a vertical plane about its pivot; a dipper handle,

pivoted intermediate its ends at the outer end of the boom, for swinging in a vertical plane about its pivot; a digging dipper iv-' oted on the lower end of the handle, and ing toward the frame; two winch drums; a sheave onthe upper end of the dipper handle; a rope, running from the bottom of the dipper, over this sheave to one drum; a guide on the bottom of the dipper, over'which'guide this r0 e is adapted to pass; a sheave on that side of the lower end of the handle nearer toward the frame; a rope, running from the front of the dipper, over this sheave, to the other drum; and means for rendering ineffective, at will, the hoisting and swinging tendencies of the first-named rope, this means consisting in a rope-drum, a brake to prevent the rotation of this drum, a rope passing from the lower portion of the handle to an anchorage on this drum, and means for taking up the slack in this rope.

9. n a back-di ging shovel, the combination of: a main frame; a boom, pivoted at its lower end to the frame, for hoisting in a vertical plane about its pivot; a dipper handle, pivoted intermediate its ends at the outer end of the boom, for swinging in a vertical plane about its pivot; a digging dipper pivoted on the lower end of the handle, and fac: ing toward the frame; two winch drums; a sheave on the upper end of the dipper handle; a rope, running from the bottom of the dipper, over this sheave, to one drum; a guide on the bottom of the dipper, over which guide this rope is adapted to pass; a sheave on that side of the lower end of the handle nearer toward the base; a rope, running from the front of the dipper, over this sheave, to the other drum; means for limiting the tilting of the dipper under the influence of the last-named rope; and means for rendering ineffective, at will, the hoisting and swinging tendencies of the first-named rope, this means consisting in a rope drum, a brake to prevent the rotation of this drum, a rope passing from the lower portion of the handle to an anchorage on this drum, and means for taking up the slack in this rope. In testimony whereof we aflix our signatures.

MITCHELL L. FYKSE. .r ROGER SHERMAN HOAR. 

